(NBA official ball standards, Size 7)A NBA official ball, manufactured by Spalding, is a Size 7 ball and measures about 30.027768218 cups. The surface of these balls have 4,118 pebbles with a diameter of 2.5 mm each.

(for 70 kg body; average altitude; average)The volume of blood in the average human body is about 20 cups. Persons living at high altitude, however, may have up to an additional 8 cups of blood to compensate for the lower oxygen level.

In other words, 30.027768218 cups is 0.862858589410 times the size of a Bowling Ball (packed), and the size of a Bowling Ball (packed) is 1.15893845440 times that amount.

(64% packing density) (USBC specifications; tenpin)According to United States Bowling Congress specifications, a tenpin bowling ball should measure at least 10.795 cm (4.25 in) in radius for a total volume of about 22.2722145850 cups. Because regulation balls measure the same diameter irrespective of their weight, ball density varies by size and balls weighing less than about 5 kg (11 lbs) will float in water.

In other words, 30.027768218 cups is 1.3482165460 times the size of a Bowling Ball, and the size of a Bowling Ball is 0.741720610810 times that amount.

(USBC specifications; tenpin)According to United States Bowling Congress specifications, a tenpin bowling ball should measure at least 10.795 cm (4.25 in) in radius for a total volume of about 22.2722145850 cups. Because regulation balls measure the same diameter irrespective of their weight, ball density varies by size and balls weighing less than about 5 kg (11 lbs) will float in water.

In other words, 30.027768218 cups is 0.639999999980 times the size of a Basketball (packed), and the size of a Basketball (packed) is 1.56250 times that amount.

(64% packing density) (NBA official ball standards, Size 7)A NBA official ball, manufactured by Spalding, is a Size 7 ball measures about 30.027768218 cups. These balls have 4,118 pebbles each with a diameter of 2.5 mm

In other words, 30.027768218 cups is 4.3530 times the size of an Ostrich Egg, and the size of an Ostrich Egg is 0.22970 times that amount.

(Struthio camelus) (for common ostrich; average)
The largest egg produced by living birds, ostrich eggs measure about 6.7630 cups in volume. The eggs take about nine weeks to hatch, with males and females taking turns incubating them.